Telephone apparatus.



'1). H. WILSON. TELEPHONE APPARATUS.

APPLICATION FILED DEC. 8, 1902.

wfi mam Mar 1, 1910.

- To all whomit mag concern:

=nAvIn H; .WILsoN, or CHICAGO, ILLINOIS, r P e cHIcaeo,"

TELEPHoiiE Be itknown that 1 DAVID H.. l-VIi.sox a citizen of the United States, residingat rains. of which .the tioi Chicago, in the county of Cook and State of Illinois. have invented a certain newt and useful Improvement in Telephone Appat'ollowing is a specifica- My invention relates to telephone a 'ipara tus and has fo-r its' object to provide a new and mproved ap 'iaratus; of th s description.

Referring to the acconipanyingdrawin'rs.

.viierein' I have illustrated my invention:

l' igrnre l is a planlview of the transformer and receiver; Fig. Qis 'an end-elevation of Fig. 1, with one receiver removedj-F 3 is a view of one of the receivers removed as seen from the-inner side; Fig. l is'an en larged longitudinal section through F 1; Fig. is a view showing the circuits of one instrument; Fig. (3 isa plan view of a trans- "the several figures.

former showing a modified construction:

.Fig. 7 is a view of the circuits when only one coil is used.

Like letters refer to like parts. throughout 1 e't'erring now to Figs. 1 to 5 inclusive, I have illustrated a transformer inclosed Within a suitable casing A. Thefcoils are placed upon th'e'coreB and may be of any suitable. form and arrangement. At one or both ends of the core B. I provide a' telephone receiver C, which may consist of anyof the may be formed in any desired way and .moved from the core.v

iusualconstructions. The primary and secondary'coils'D and E of'the induction coil wound upon the core inlany suitable man-- ner. As herein shown. the' two coils are wound -upon' separate sleeves, so that they may be independently placed upon and re- Both of these coils are preferably divided into sections. The

primary coil, for example, hasthe ends of the two sections connected to the binding post--D w1iile' the other ends are connected to tlie'bindiiig post D The secondary coil has one end of each section connected'to the binding post E and'the other end connected to the binding post E :Itisof course eviof the "coils intosecdentthat the dividing I but when this contions may be omitted",

.struction is used the transmitter F is connected between the two sections of the primary coil, as shown in Fig. Kl hen the secondary coil is divided into sections. l

.ASSIGNQR T0. G

- Specification of Letters Patent. 4 Application filed Dec' en eer 8, 190a serial. No. '134,2 62 I ILLINOIS.

APPARATUS.-

prefer to arrange it so that the two-sections may be connected injseries or ;in multiple.

switches G, G and G When the switches (gland Gr are-closed,' the two sections are in multiple. liether or not the coils will be the conditions presented.

"detachably attached to {'[lit ends of the case held-in position by the set screws C 111 Fig. 1. I have shown the two receivers. al-

instead of horns I havc shown tubes 1 1. which maybe placed to the hearers ears.'

, I11 Fig,- 7; I have illustrated thecir'cints .struction is adapted for submarineuse because of. the arrangement of the parts for EORGE w. Knnrzinenn; 0F

"i 'ateuted Mar. 1, io o;

This result is obtained by'meansof the G and G are open and the switch G is closed, the two sect ons are in series, and when the switch G is open and the switches used in series or inmultiple depends upon The receivers C are preferably formed in a cap, which is -whe'reinonly the coil D .is used, there heing placed in circuit with the coil and the trans-- mittera generator or dynamo I. This coning of the induction coil and whichmay be tl'iough'one may be used, andthese receiver-s are each provided with horns H. In Fig. (-3.

various reasons among which may be men 'tioiied the arrangement and location of the effect when the conductors are 'in cables.

ceiver directly to the core of the. induction coil, so as to be act-uated'thereby, I obviate the insertion in the circuit of an extra coil and'core necessary for the receiver. and this among other advantages also insures far I have illustrated in detail particular constructions embodying my invention, but these constructions are .more or less diagrammatic and are used for purposes of illustration to-make my invention clear, It is of course evident that the parts may be greatly; varied in form. construction and be omitted and others used with parts not spirit of my invention. I therefore do not limit myself to the ttlllfill'llttlfllls shown; I claim:

1'. The combination with an induction co l ondary coil one over the other, both the prima ry and secondary coils being divided into It will beseen that by applying the re better results'than are-otherwise attainable] arrangement and that some of thepa-rts may parts; as tlllS'Zl1 t1I1gQl1i1lt and location. per nuts the reduction of the adverse induction,

herein shovv n, without departing from the having. a suitable core. of a primary and see,

separate sections, a casing for such coils, two removable end "pieces connected with said casing, a telephone receiver opposed to each end of said core, said telephone receivers forming the end of the casing.

2. The combination with an induction coil of an inclos-ing casing therefor, two telephone receivers, one opposed to each end of the core of said coil so as to be actuated thereby, the coils separated into sections by aseparating device near the middle thereof, and a telephonetransmitter in circuit with said induction coil.

3..A-telephone apparatus comprising an induction coil provided with a coil conductor divided into sections, a telephone transmitter connected in circuit between the sections, and a telephone receiver associated with each end of the core of said coil.

4 A telephone system, comprising a coiled conductor Wrapped about a core and dividedinto two sections, and a telephone transmitter interposed in the circuit between the two sections ofthe coil'asource of electric supply in circuit with said coil, one of the sections of the coil being intermediate the transmitter and the source of electric supply the other section of said coil located at a differentpoint in the circuit.

5; A telephone system comprising a coiled abouta core and divided into two sections, a terposed in the circuit between the two sections of the coil, a casing inclosmg said coil.

' provided with a telephone transmitter in a series of binding posts on the periphery of said casing, ,a receiver associated with the core of said coil, and a generator in circuit with the coil and transmitter.

6. A telephone apparatus, comprising aninduction coil, having a primary and secondary coil, the primary coil being divided into sections, a transmitter inserted in circuit between the sections of the primary coil, a receiver provided with a diaphragm opposed to the core of the induction coil and actuated therebyf 7. Atelephone apparatus, comprising an induction coil, having a primary and secondary coil, the secondary coil being divided into sections, means for connecting said sec tions in series or in multiple, a receiver provided with a diaphragm opposed to the core of the induction coil and actuated thereby.

8. A telephone apparatus, comprising an induction coil, having a primaryand sec ondary coil, the primary coil being divided into sections, a transmitterinserted between the sections of the primary "coil, a receiver diaphragm opposed to the a core of the induction coil and actuated thereby, the secondary coil being divided into sections, and means for connecting said sections in series or in multiple.

DAVID H. TILSON.

WVitnesses:

EDWARD T. WRAY, I-IoMnnL. KRA T. 

